Aaron Swartz, a celebrated internet freedom activist and early developer of the website Reddit, has died at 26.

The activist and programmer took his life in his New York apartment, a relative and the state medical examiner said. His body was found on Friday.

A sad day, especially for those who share Aaron Swartz’s commitment to openness and admire his commitment to the development of tools, services and standards, such as RSS, which have helped to make open access to resources accessible on a global basis.